<mijnui:radio.group>
    <mijnui:radio id="option1" name="options" label="Option 1" />
    <mijnui:radio id="option2" name="options" label="Option 2" />
    <mijnui:radio id="option3" name="options" label="Option 3" />
</mijnui:radio.group>

<mijnui:radio.group>
    <mijnui:radio id="option1" name="options" label="Option 1" />
    <mijnui:radio checked id="option2" name="options" label="Option 2" />
    <mijnui:radio id="option3" name="options" label="Option 3" />
</mijnui:radio.group>